The neutrino mass thing is much less a surprise than the rest. Neutrino mass always was quite possible as an optional add-on. Basically, the situation for the q

The neutrino mass thing is much less a surprise than the rest. Neutrino mass always was quite possible as an optional add-on. Basically, the situation for the quarks, where all six have mass, can be copied to apply to the leptons as well.